From e939850863efcd79a698f75c333db610fad9a4c8 Mon Sep 17 00:00:00 2001
From: bqy_fe <1743369777@qq.com>
Date: Fri, 8 Jul 2022 21:30:53 +0800
Subject: [PATCH] perf(components): [slider] emit UPDATE_MODEL_EVENT only if
 value changes (#8603)

---
 .../components/slider/src/composables/use-slider-button.ts   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/components/slider/src/composables/use-slider-button.ts b/packages/components/slider/src/composables/use-slider-button.ts
index 6106ed7685..8366992afe 100644
--- a/packages/components/slider/src/composables/use-slider-button.ts
+++ b/packages/components/slider/src/composables/use-slider-button.ts
@@ -251,7 +251,10 @@ export const useSliderButton = (
     let value =
       steps * lengthPerStep * (max.value - min.value) * 0.01 + min.value
     value = Number.parseFloat(value.toFixed(precision.value))
-    emit(UPDATE_MODEL_EVENT, value)
+
+    if (value !== props.modelValue) {
+      emit(UPDATE_MODEL_EVENT, value)
+    }
 
     if (!initData.dragging && props.modelValue !== initData.oldValue) {
       initData.oldValue = props.modelValue